A method for preparing a titanium-based amorphous alloy for precision molding

Abstract

The application discloses a preparation method of a titanium-based amorphous alloy for precision forming, and the titanium-based amorphous alloy comprises the following components in percentage by mass: Ti 35-50%, Zr 28-35%, Cu 7-15%, Be 1.8-4.6%, Sr 1.5-3%, Ce 1.5-3%, Nb 1.5-3%, Ta 1.5-3%, C≤0.1%, and inevitable impurities. In the application, Sr and Ce are prepared into Sr-Ce pre-alloy powder, Nb and Ta are prepared into Nb-Ta-C pre-alloy particles, then the Ti, Zr, Cu and Be are mixed according to the proportion, vacuum melting and die casting are performed to obtain the titanium-based amorphous alloy product. The titanium-based amorphous alloy prepared in the application has the advantages of low density, high strength, high precision, no magnetism and the like, and is particularly suitable for manufacturing precision parts such as folding equipment hinges which have strict requirements on light weight and high precision.

Description

Technical Field

[0001] This invention belongs to the field of amorphous alloy technology, specifically relating to a method for preparing a titanium-based amorphous alloy for precision forming. Background Technology

[0002] The hinge assembly of a folding device is the core structural component that enables the folding function. It serves both as a support and a load-bearing element, and its thickness directly determines the overall thickness of the device. Its flexibility of movement determines the smoothness of opening and closing. The hinge must simultaneously meet the requirements of high strength, high wear resistance and fatigue resistance, as well as high precision. With the popularization of large-screen and multi-screen folding devices, lightweighting has become a core requirement, and the weight of the hinge significantly affects the portability of the entire device.

[0003] Currently, hinge manufacturing mainly employs two technical routes: powder metallurgy stainless steel and zirconium-based amorphous alloy die casting. Powder metallurgy commonly uses stainless steels such as 316L and 17-4PH, which, after sintering, retain 1% to 5% residual porosity, resulting in a density of only 95% to 99%. This leads to decreased mechanical properties and a tendency to form stress concentration and fatigue crack initiation sites, shortening service life. Furthermore, it is difficult to meet the requirements of high-end folding equipment in terms of specific strength and assembly yield.

[0004] Zirconium-based amorphous alloys are currently the mainstream commercial bulk amorphous materials, with a density ≥99.9%, high tensile strength, small dimensional tolerances, non-magnetic properties, and high die-casting efficiency, making them suitable for precision hinge molding. However, zirconium-based amorphous alloys have a relatively high density (6.5~7.0 g / cm³). 3 The material has insufficient potential for lightweighting; moreover, it is highly oxygen sensitive (requiring a melt oxygen content ≤500ppm), easily precipitating crystalline phases that lead to brittle fracture, thus limiting molding yield. Existing patent CN202311855313.0 focuses on hinge structure optimization, without addressing lightweight improvements to the material itself. CN202610082051.6 still uses conventional zirconium-based amorphous materials, showing no substantial breakthroughs in density reduction and molding precision improvement.

[0005] To achieve lightweighting, the industry has attempted to introduce titanium to develop titanium-based amorphous alloys, reducing the density to 5.0~5.5 g / cm³. 3 It has a significant advantage in specific strength. However, titanium-based amorphous alloys face three major technical bottlenecks: First, they are extremely sensitive to oxygen (requiring an oxygen content of ≤400ppm in the melt), making them prone to oxidation and crystallization; second, they have weak amorphous forming ability, making it difficult to prepare large-sized complex structural parts by die casting; and third, they are prone to reacting with crucible materials during the melting process to produce inclusions, which deteriorates the forming performance.

[0006] In summary, existing technologies cannot simultaneously meet the multiple requirements of low density, high amorphous forming capability, low oxygen content, and precision die casting, making it difficult to satisfy the dual demands of lightweight and high precision for hinges in folding devices. Therefore, developing a titanium-based amorphous alloy with excellent amorphous forming capability, low oxygen sensitivity, and low density, along with its precision forming process, has become an urgent technical problem to be solved in this field. Summary of the Invention

[0007] The purpose of this invention is to provide a method for preparing titanium-based amorphous alloys for precision forming, aiming to solve the problems of existing zirconium-based amorphous alloys having high density and insufficient potential for lightweighting, as well as titanium-based amorphous alloys having high oxygen sensitivity, weak amorphous forming ability, easy reaction with crucible to generate inclusions, and difficulty in preparing large-size complex precision components through die casting.

[0008] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: This invention provides a method for preparing a titanium-based amorphous alloy for precision forming, wherein the composition of the titanium-based amorphous alloy comprises, by mass percentage: Ti 35~50%, Zr 28~35%, Cu 7~15%, Be 1.8~4.6%, Sr 1.5~3%, Ce 1.5~3%, Nb 1.5~3%, Ta 1.5~3%, C≤0.1%, balance being unavoidable impurities.

[0009] The method for preparing titanium-based amorphous alloys for precision forming in this invention achieves significant technical advantages by optimizing the alloy composition and combining it with pre-alloying and die-casting processes: the alloy density is reduced to 5.0~5.5 g / cm³. 3 Compared to conventional zirconium-based amorphous alloys, this alloy reduces weight by 15% to 25%, effectively meeting the lightweight requirements of hinges for folding devices. Simultaneously, this alloy possesses excellent amorphous forming ability; combined with low oxygen content control and high-precision die casting, it can produce fully dense, non-magnetic, and high-strength amorphous alloy products, significantly improving die casting yield and production efficiency. This solves the technical challenges of existing titanium-based amorphous alloys, such as high oxygen sensitivity, easy crystallization, and difficulty in forming complex and precise components, providing an ideal material solution for folding device hinges that combines lightweight design with high precision.

[0010] Furthermore, Sr and Ce are added in the form of a Sr-Ce pre-alloy, with a mass ratio of Sr to Ce of 1.15:1 to 1.30:1 during the preparation of the Sr-Ce pre-alloy. This invention employs a Sr-Ce pre-alloy form and controls a specific mass ratio, effectively preventing the volatilization and burn-off of the active element Sr during high-temperature melting, ensuring precise control of the alloy composition, and reducing inclusions caused by Sr burn-off, thereby improving alloy purity and die-casting yield. Simultaneously, the pre-alloying treatment avoids inclusions caused by localized overheating or reaction with the crucible when directly adding elemental Sr, further improving alloy purity and die-casting yield.

[0011] Furthermore, the Sr-Ce pre-alloy is prepared by the following powder spraying process: under the protection of an inert atmosphere, Sr and Ce with a mass ratio of 1.15:1 to 1.30:1 are melted and then rapidly solidified by atomization powder spraying process at a cooling rate of 25℃ / s to 30℃ / s to produce spherical Sr-Ce pre-alloy powder.

[0012] This invention employs an inert atmosphere physicochemical spraying process to prepare Sr-Ce pre-alloys, and uses rapid cooling solidification technology to obtain spherical alloy powders. The entire process takes place under an inert atmosphere, preventing Sr and Ce from oxidizing upon contact with air. Rapid cooling maintains the spherical morphology of the pre-alloy particles, giving them good fluidity. It also suppresses component segregation and ensures uniform internal structure of the pre-alloy powder, enabling rapid and uniform melting during subsequent preparation of titanium-based amorphous alloys. This reduces melt residence time and further lowers the risk of burn-off and oxidation of active elements.

[0013] Furthermore, the inert atmosphere is a mixture of argon and helium, wherein the volume percentage of argon is 99.8% to 99.9%, and the oxygen content in the inert atmosphere is ≤20ppm; the melting temperature is 650℃ to 750℃, and the melting space is maintained under positive pressure.

[0014] Helium's high thermal conductivity accelerates heat dissipation from the melt, facilitating rapid solidification. Strict low-oxygen conditions effectively prevent the oxidation and combustion of Sr and Ce during the melting process, while a positive pressure environment prevents external air from entering, further ensuring process safety. Controlling the melting temperature within a range that ensures complete melting of Sr and Ce while avoiding excessive Sr volatilization due to overheating improves the accuracy of the pre-alloy composition and the preparation yield.

[0015] Furthermore, during the preparation process, the melting includes: First, place Ce at the bottom of the zirconia crucible, then add Sr; After heating to 650℃~750℃, hold the temperature for 15min~20min, and use electromagnetic stirring to make the melt uniform.

[0016] During the melting process, Ce is first placed at the bottom of the crucible, followed by Sr. Ce's higher melting point allows it to melt first, forming a molten pool. When Sr is added subsequently, it is quickly encapsulated in this pool, effectively reducing Sr volatilization loss during heating. Holding at this temperature for 15-20 minutes with electromagnetic stirring ensures thorough alloying of Sr and Ce, resulting in a uniform composition. This avoids localized Sr- or Ce-rich areas caused by uneven mixing, thus improving the quality stability of the pre-alloyed powder.

[0017] Furthermore, the atomization powder spraying process employs a tightly coupled gas atomizing nozzle, using high-purity argon as the atomizing gas, with an atomization pressure of 3MPa~8MPa and a gas-liquid mass ratio of 0.8:1~1.5:1. The Sr-Ce pre-alloyed powder has a sphericity ≥0.7 and a particle size of 150~250μm. The Sr-Ce pre-alloyed powder is collected and sieved under an inert atmosphere, and then vacuum-sealed in an environment with an oxygen content ≤5ppm. The pre-alloyed powder prepared by the method of this invention has good flowability and a moderate specific surface area, facilitating subsequent mixing and smelting. The inert atmosphere and vacuum sealing effectively prevent oxidation and deterioration of the pre-alloyed powder during storage and transportation, ensuring the activity and purity of the powder.

[0018] Furthermore, Nb and Ta are added in the form of an Nb-Ta-C pre-alloy, with a Nb to Ta mass ratio of 1:1 during preparation. Pre-alloying effectively avoids the refractory homogeneity and compositional segregation caused by the direct addition of high-melting-point elemental Nb and Ta. Pre-alloying allows Nb and Ta to first form a homogeneous solid solution, significantly reducing the melting temperature and holding time in the subsequent titanium-based amorphous melting process, and minimizing the erosion of the crucible by the melt and the burn-off of active elements. The introduction of trace amounts of carbon refines the microstructure, adsorbs impurities, and further improves the purity and amorphous forming ability of the alloy.

[0019] Furthermore, the preparation of the Nb-Ta-C pre-alloy includes: Nb and Ta raw materials in a mass ratio of 1:1 are mixed evenly with TaC powder accounting for 0.1% to 0.3% of the total mass of the Nb and Ta raw materials. Vacuum degree ≤ 5 × 10 -2 Under the condition of Pa, it is melted in a vacuum electric arc furnace until completely melted, and then turned and melted 3 to 5 times to obtain Nb-Ta-C pre-alloyed ingots; The ingot is mechanically crushed and screened sequentially to obtain Nb-Ta-C pre-alloyed particles with a particle size of 2mm~5mm.

[0020] Nb-Ta-C pre-alloys were prepared by vacuum arc furnace melting, where the high vacuum environment effectively prevented the oxidation of Nb and Ta at high temperatures. The addition of trace amounts of TaC powder, uniformly distributed during melting through electromagnetic or arc stirring, achieved both grain refinement and deoxidation purification. The 2mm~5mm pre-alloy particles facilitate subsequent batching and weighing, and melt rapidly during the titanium-based amorphous alloy melting process, reducing the high-temperature residence time of the melt and thus lowering the risk of introducing impurities such as oxygen and nitrogen.

[0021] Furthermore, the preparation method of the titanium-based amorphous alloy for precision forming includes the following steps: Weigh out the Ti, Zr, Cu, Be, Sr-Ce pre-alloy and Nb-Ta-C pre-alloy raw materials according to the stated mass percentages, mix them evenly to obtain a mixture; The mixture is placed in a vacuum induction melting furnace or a vacuum arc melting furnace, with a vacuum degree ≤1×10⁻⁶. -2 Under the protection of Pa or an inert atmosphere, melt at 1100℃~1300℃ for 10min~20min, and after melting, quickly turn it over once to obtain titanium-based amorphous alloy melt; The titanium-based amorphous alloy melt was formed by die casting with a cooling rate of 10. 2 K / s ~10 4 K / s yields titanium-based amorphous alloy products.

[0022] This invention achieves significant synergistic effects through an integrated process combining pre-alloyed raw materials, vacuum-protected melting, and rapid die casting. Pre-alloying avoids the loss of active elements and the segregation of high-melting-point metals, ensuring compositional accuracy; repeated melting under vacuum or inert atmospheres results in a highly uniform and pure alloy melt; and high-cooling-rate die casting ensures the acquisition of an amorphous structure. This process route achieves full-process optimization from raw materials to finished product, combining the advantages of low density, high amorphous formation capability, high purity, and high dimensional accuracy.

[0023] Furthermore, the injection pressure of the die-casting process is 120MPa~150MPa, the mold preheating temperature is 150℃~160℃, and the die-casting speed is 0.95m / s~1.25m / s. By optimizing the die-casting process parameters, under the appropriate combination of injection pressure, mold preheating temperature, and die-casting speed, it is ensured that the alloy melt can quickly fill the fine structure of the mold cavity to obtain complex-shaped products with high dimensional accuracy, while avoiding defects such as flow marks and air entrapment caused by excessively fast filling or excessively high temperature. At the same time, it is matched with a high cooling rate to ensure the uniform formation of amorphous structure.

[0024] In summary, compared with the prior art, the method for preparing titanium-based amorphous alloys for precision forming provided by the present invention achieves the following significant beneficial effects through the systematic integration of alloy composition optimization, pre-alloying treatment, and precision die-casting process: 1. By replacing the traditional zirconium-based amorphous alloy system with titanium-based alloys, the alloy density is significantly reduced while maintaining good mechanical properties, achieving the goal of weight reduction while meeting the requirements for hinge strength in folding devices.

[0025] 2. By introducing two pre-alloys as raw materials in the preparation method, the problem of adding active elements and high-melting-point elements together is effectively solved, improving the purity and compositional uniformity of the alloy. Combined with the high-cooling-rate die-casting process, good amorphous forming ability is obtained, significantly improving the die-casting yield and production efficiency.

[0026] 3. By adopting a process route that combines pre-alloying with precision die casting, near-net-shape forming is achieved, resulting in products with high dimensional accuracy and good surface quality. This eliminates the need for extensive post-processing, thus meeting the requirements of folding equipment hinges for complex structures and high assembly precision.

[0027] 4. Through inert atmosphere protection throughout the process, vacuum melting, and optimized die-casting parameters, the oxygen content and impurity levels in the alloy are effectively controlled. The process window is wide, the stability is good, and it is suitable for mass industrial production. Detailed Implementation

[0028] To make the objectives, technical solutions, and technical effects of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. The embodiments described below are some embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art in conjunction with the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed; where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0029] It should be understood that the weights of the relevant components mentioned in the embodiments of this invention can refer not only to the specific content of each component, but also to the proportional relationship between the weights of the components. Therefore, any scaling up or down of the content of the relevant components according to the embodiments of this invention is within the scope of this invention. Specifically, the weights mentioned in the embodiments of this invention can be well-known units of mass in the chemical industry, such as μg, mg, g, and kg.

[0030] The testing methods used in this embodiment of the invention are described below: (1) The contents of major elements such as Ti, Zr, Cu, Be, Sr, Ce, Nb and Ta in the alloy were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The testing methods for each element were performed in accordance with the corresponding national standards.

[0031] (2) Carbon content test: The carbon content in the alloy was determined by infrared carbon-sulfur analyzer.

[0032] (3) Oxygen content test: The oxygen content in the alloy was determined using an oxygen-nitrogen analyzer.

[0033] (4) Density test: The density of the alloy was determined by using Archimedes' displacement method and an electronic density balance.

[0034] (5) Vickers hardness test: The Vickers hardness of the alloy is determined by a micro Vickers hardness tester. The test method is in accordance with GB / T4340.1 standard.

[0035] (6) Amorphous forming ability test: After melting in a vacuum electric arc furnace, rod-shaped samples of different diameters (φ2mm~φ10mm) were cast into copper molds. The phase composition of the sample core was detected by X-ray diffraction (XRD) to obtain the maximum diameter of the completely amorphous structure as the critical diameter to evaluate the amorphous forming ability of the alloy.

[0036] (7) Bending strength test: Three-point bending test was performed using a universal testing machine, in accordance with GB / T 232 standard, to determine the bending strength of the alloy.

[0037] It should be noted that the mass percentages of the alloy composition in the embodiments of this invention are all obtained based on testing methods such as inductively coupled plasma atomic emission spectrometry (ICP-AES), infrared carbon-sulfur analyzer, and oxygen-nitrogen analyzer. These testing methods all have certain uncertainties in sample preparation, instrument calibration, environmental conditions, and data processing. Typically, the relative expanded uncertainty of the test results for each element is approximately ±0.1% to ±0.5% (coverage factor k=2, confidence level approximately 95%). Therefore, the sum of the measured mass percentages of each component in the embodiments may fluctuate. Those skilled in the art should understand that this slight deviation is a normal phenomenon in analytical testing and does not affect the determination of the true composition of the alloy. All alloy compositions falling within the scope defined by the claims of this invention are considered as technical solutions of this invention.

[0038] Furthermore, the Nb and Ta contents mentioned in the embodiments of this invention refer to the actual measured contents in the final titanium-based amorphous alloy product. Because Nb and Ta have different melting points during the smelting process, and their interactions with other components in the melt are slightly different, even if a mass ratio of Nb:Ta = 1:1 is used during feeding, the measured contents of Nb and Ta in the final alloy may still have slight differences after vacuum arc melting and subsequent die casting (this difference may not be reflected when rounded to one decimal place due to testing accuracy and rounding rules). Those skilled in the art should understand that the above differences are within the normal range of process fluctuations and do not affect the implementation of this invention or the achievement of its technical effects. All alloy compositions falling within the scope defined by the claims of this invention (Nb 1.5~3%, Ta 1.5~3%) are considered as technical solutions of this invention. Example

[0039] The alloy composition of the titanium-based amorphous alloy for precision forming provided in this embodiment, by mass percentage, is: Ti 36.6%, Zr 35.0%, Cu 15.0%, Be 4.6%, Sr 3.0%, Ce 2.4%, Nb 1.6%, Ta 1.6%, C 0.08%, with the balance being unavoidable impurities.

[0040] Preparation of Sr-Ce pre-alloy: Metallic Sr and metallic Ce were weighed according to a mass ratio of Sr:Ce = 1.25:1. Ce was placed at the bottom of a zirconia crucible first, followed by Sr. The mixture was heated to 700℃ and held for 18 minutes in a mixed atmosphere of argon and helium (argon volume percentage 99.9%, oxygen content ≤20ppm), with electromagnetic stirring to ensure homogeneity. A tightly coupled gas atomizing nozzle was used, employing high-purity argon (99.999% purity) as the atomizing gas at a pressure of 5MPa and a gas-liquid mass ratio of 1.2:1. The mixture was rapidly solidified at a cooling rate of 28℃ / s to produce near-spherical Sr-Ce pre-alloy powder. The powder had a sphericity ≥0.7 and a particle size of 150~250μm. The powder was collected and sieved under an inert atmosphere, and then vacuum-sealed in an environment with an oxygen content ≤5ppm.

[0041] Preparation of Nb-Ta-C pre-alloy: Weigh Nb and Ta raw materials according to a mass ratio of Nb:Ta = 1:1, add TaC powder accounting for 0.2% of the total mass of Nb and Ta, and mix thoroughly. Under a vacuum degree ≤ 5 × 10⁻⁶ -2 Under the condition of Pa, the Nb-Ta-C pre-alloyed ingot is melted in a vacuum electric arc furnace until completely melted, and then turned over and melted four times to obtain an Nb-Ta-C pre-alloyed ingot. The ingot is then mechanically crushed and screened to obtain Nb-Ta-C pre-alloyed particles with a particle size of 2 mm to 5 mm.

[0042] Preparation of titanium-based amorphous alloys: Weigh out Ti, Zr, Cu, Be, Sr-Ce pre-alloy, and Nb-Ta-C pre-alloy raw materials according to the above alloy composition mass percentages, and mix them evenly. Place the mixture in a vacuum induction melting furnace, and melt it under a vacuum degree ≤1×10⁻⁶. -2 Under the protection of Pa, the mixture was melted at 1200℃ for 12 minutes, and then quickly turned over once after melting to obtain a titanium-based amorphous alloy melt. The melt was then formed by die casting with an injection pressure of 135MPa, a mold preheating temperature of 155℃, a die casting speed of 1.1m / s, and a cooling rate of 10. 3 K / s yields titanium-based amorphous alloy products.

[0043] Performance testing: The density of the titanium-based amorphous alloy product is 5.2 g / cm³. 3 The bending strength is 1650 MPa, the Vickers hardness is 452 HV, and the oxygen content is 0.015 wt%. The critical diameter was determined by casting bars of different diameters using copper molds and combining this with X-ray diffraction to detect the amorphous phase. The critical diameter was found to be 8 mm. Example

[0044] The alloy composition of the titanium-based amorphous alloy for precision forming provided in this embodiment, by mass percentage, is: Ti 40.2%, Zr 33.5%, Cu 13.2%, Be 4.6%, Sr 3.0%, Ce 2.4%, Nb 1.5%, Ta 1.5%, C 0.08%, with the balance being unavoidable impurities.

[0045] Preparation of Sr-Ce pre-alloy: Metallic Sr and metallic Ce were weighed according to a mass ratio of Sr:Ce = 1.25:1. Ce was placed at the bottom of a zirconia crucible first, followed by Sr. The mixture was heated to 680℃ and held for 20 minutes in a mixed atmosphere of argon and helium (argon volume percentage 99.8%, oxygen content ≤20ppm) to ensure homogeneity. Using a tightly coupled gas atomizing nozzle, high-purity argon (99.999% purity) was used as the atomizing gas at a pressure of 4MPa and a gas-liquid mass ratio of 1.0:1. The mixture was rapidly solidified at a cooling rate of 26℃ / s to produce near-spherical Sr-Ce pre-alloy powder. The powder had a sphericity ≥0.7 and a particle size of 150~250μm. The powder was collected and sieved under an inert atmosphere, and then vacuum-sealed in an environment with an oxygen content ≤5ppm.

[0046] Preparation of Nb-Ta-C pre-alloy: Weigh Nb and Ta raw materials according to a mass ratio of Nb:Ta = 1:1, add TaC powder accounting for 0.15% of the total mass of Nb and Ta, and mix thoroughly. Under a vacuum degree ≤ 5 × 10⁻⁶ -2Under the condition of Pa, the Nb-Ta-C pre-alloyed ingot is melted in a vacuum electric arc furnace until completely melted, and then turned over and melted three times to obtain an Nb-Ta-C pre-alloyed ingot. The ingot is then mechanically crushed and screened to obtain Nb-Ta-C pre-alloyed particles with a particle size of 2 mm to 5 mm.

[0047] Preparation of titanium-based amorphous alloys: Weigh out Ti, Zr, Cu, Be, Sr-Ce pre-alloy, and Nb-Ta-C pre-alloy raw materials according to the above alloy composition mass percentages, and mix them evenly. Place the mixture in a vacuum induction melting furnace, and melt it under a vacuum degree ≤1×10⁻⁶. -2 Under the protection of Pa, the mixture was melted at 1150℃ for 15 minutes, and then quickly turned over once after melting to obtain a titanium-based amorphous alloy melt. The melt was then formed by die casting with an injection pressure of 130 MPa, a mold preheating temperature of 152℃, a die casting speed of 1.0 m / s, and a cooling rate of 5 × 10⁻⁶ m / s. 2 K / s yields titanium-based amorphous alloy products.

[0048] Performance testing: The density of the titanium-based amorphous alloy product is 5.1 g / cm³. 3 The bending strength is 1580 MPa, the Vickers hardness is 448 HV, and the oxygen content is 0.025 wt%. The critical diameter was determined by casting bars of different diameters using copper molds and combining this with X-ray diffraction to detect the amorphous phase. The critical diameter was found to be 8 mm. Example

[0049] The alloy composition of the titanium-based amorphous alloy for precision forming provided in this embodiment, by mass percentage, is: Ti 41.4%, Zr 30.2%, Cu 15.0%, Be 4.6%, Sr 3.0%, Ce 2.4%, Nb 1.6%, Ta 1.6%, C 0.055%, with the balance being unavoidable impurities.

[0050] Preparation of Sr-Ce pre-alloy: Metallic Sr and metallic Ce were weighed according to a mass ratio of Sr:Ce = 1.25:1. Ce was placed at the bottom of a zirconia crucible first, followed by Sr. The mixture was heated to 720℃ and held for 17 minutes in a mixed atmosphere of argon and helium (argon volume percentage 99.9%, oxygen content ≤20ppm) to ensure homogeneity. Using a tightly coupled gas atomizing nozzle, high-purity argon (99.999% purity) was used as the atomizing gas at a pressure of 6MPa and a gas-liquid mass ratio of 1.3:1. The mixture was rapidly solidified at a cooling rate of 27℃ / s to produce near-spherical Sr-Ce pre-alloy powder. The powder had a sphericity ≥0.7 and a particle size of 150~250μm. The powder was collected and sieved under an inert atmosphere, and then vacuum-sealed in an environment with an oxygen content ≤5ppm.

[0051] Preparation of Nb-Ta-C pre-alloy: Weigh Nb and Ta raw materials according to a mass ratio of Nb:Ta = 1:1, add TaC powder accounting for 0.18% of the total mass of Nb and Ta, and mix thoroughly. Under a vacuum degree ≤ 5 × 10⁻⁶ -2 Under the condition of Pa, the Nb-Ta-C pre-alloyed ingot is melted in a vacuum electric arc furnace until completely melted, and then turned over and melted four times to obtain an Nb-Ta-C pre-alloyed ingot. The ingot is then mechanically crushed and screened to obtain Nb-Ta-C pre-alloyed particles with a particle size of 2 mm to 5 mm.

[0052] Preparation of titanium-based amorphous alloy: Ti, Zr, Cu, Be, Sr-Ce pre-alloy, and Nb-Ta-C pre-alloy raw materials were weighed according to the above alloy composition by mass percentage and mixed evenly. The mixture was placed in a vacuum arc melting furnace and melted at 1180℃ for 12 minutes under an inert atmosphere. After melting, the mixture was quickly turned over once to obtain a titanium-based amorphous alloy melt. The melt was then formed by die casting with an injection pressure of 132 MPa, a mold preheating temperature of 153℃, a die casting speed of 1.05 m / s, and a cooling rate of 8 × 10⁻⁶. 2 K / s yields titanium-based amorphous alloy products.

[0053] Performance testing: The density of the titanium-based amorphous alloy product is 5.2 g / cm³. 3 The bending strength is 1620 MPa, the Vickers hardness is 450 HV, and the oxygen content is 0.021 wt%. The critical diameter was determined by casting bars of different diameters using copper molds and combining this with X-ray diffraction to detect the amorphous phase. The critical diameter was found to be 6 mm. Example

[0054] The alloy composition of the titanium-based amorphous alloy for precision forming provided in this embodiment, by mass percentage, is: Ti 44.5%, Zr 32.8%, Cu 11.0%, Be 3.2%, Sr 2.2%, Ce 1.8%, Nb 2.2%, Ta 2.2%, C 0.05%, with the balance being unavoidable impurities.

[0055] Preparation of Sr-Ce pre-alloy: Metallic Sr and metallic Ce were weighed according to a mass ratio of Sr:Ce = 1.22:1. Ce was placed at the bottom of a zirconia crucible first, followed by Sr. The mixture was heated to 700℃ and held for 18 minutes in a mixed atmosphere of argon and helium (argon volume percentage 99.9%, oxygen content ≤20ppm) to ensure homogeneity. Using a tightly coupled gas atomizing nozzle, high-purity argon (99.999% purity) was used as the atomizing gas at a pressure of 5MPa and a gas-liquid mass ratio of 1.2:1. The mixture was rapidly solidified at a cooling rate of 28℃ / s to produce near-spherical Sr-Ce pre-alloy powder. The powder had a sphericity ≥0.7 and a particle size of 150~250μm. The powder was collected and sieved under an inert atmosphere, and then vacuum-sealed in an environment with an oxygen content ≤5ppm.

[0056] Preparation of Nb-Ta-C pre-alloy: Weigh Nb and Ta raw materials according to a mass ratio of Nb:Ta = 1:1, add TaC powder accounting for 0.2% of the total mass of Nb and Ta, and mix thoroughly. Under a vacuum degree ≤ 5 × 10⁻⁶ -2 Under the condition of Pa, the Nb-Ta-C pre-alloyed ingot is melted in a vacuum electric arc furnace until completely melted, and then turned over and melted four times to obtain an Nb-Ta-C pre-alloyed ingot. The ingot is then mechanically crushed and screened to obtain Nb-Ta-C pre-alloyed particles with a particle size of 2 mm to 5 mm.

[0057] Preparation of titanium-based amorphous alloys: Weigh out Ti, Zr, Cu, Be, Sr-Ce pre-alloy, and Nb-Ta-C pre-alloy raw materials according to the above alloy composition mass percentages, and mix them evenly. Place the mixture in a vacuum induction melting furnace, and melt it under a vacuum degree ≤1×10⁻⁶. -2 Under the protection of Pa, the mixture was melted at 1200℃ for 10 minutes. After melting, it was quickly turned over once to obtain a titanium-based amorphous alloy melt. The melt was then formed by die casting with an injection pressure of 135MPa, a mold preheating temperature of 155℃, a die casting speed of 1.1m / s, and a cooling rate of 10³K / s to obtain a titanium-based amorphous alloy product.

[0058] Performance testing: The density of the titanium-based amorphous alloy product is 5.2 g / cm³. 3 The material has a bending strength of 1720 MPa, a Vickers hardness of 468 HV, and an oxygen content of 0.029 wt%. The critical diameter was determined by casting rods of different diameters using copper molds and combining this with X-ray diffraction to detect the amorphous phase; the critical diameter was found to be 6 mm. Example

[0059] The alloy composition of the titanium-based amorphous alloy for precision forming provided in this embodiment, by mass percentage, is: Ti 45.0%, Zr 33.0%, Cu 11.0%, Be 3.2%, Sr 2.0%, Ce 1.7%, Nb 2.0%, Ta 2.0%, C 0.04%, with the balance being unavoidable impurities.

[0060] Preparation of Sr-Ce pre-alloy: Metallic Sr and metallic Ce were weighed according to a mass ratio of Sr:Ce = 1.18:1. Ce was placed at the bottom of a zirconia crucible first, followed by Sr. The mixture was heated to 690℃ and held for 17 minutes in a mixed atmosphere of argon and helium (argon volume percentage 99.85%, oxygen content ≤20ppm), with electromagnetic stirring to ensure homogenization. A tightly coupled gas atomizing nozzle was used, employing high-purity argon (99.999% purity) as the atomizing gas at a pressure of 4.5MPa and a gas-liquid mass ratio of 1.1:1. The mixture was rapidly solidified at a cooling rate of 27℃ / s to produce near-spherical Sr-Ce pre-alloy powder. The powder had a sphericity ≥0.7 and a particle size of 150~250μm. The powder was collected and sieved under an inert atmosphere, and then vacuum-sealed in an environment with an oxygen content ≤5ppm.

[0061] Preparation of Nb-Ta-C pre-alloy: Weigh Nb and Ta raw materials according to a mass ratio of Nb:Ta = 1:1, add TaC powder accounting for 0.12% of the total mass of Nb and Ta, and mix thoroughly. Under a vacuum degree ≤ 5 × 10⁻⁶ -2 Under the condition of Pa, the Nb-Ta-C pre-alloyed ingot is melted in a vacuum electric arc furnace until completely melted, and then turned over and melted three times to obtain an Nb-Ta-C pre-alloyed ingot. The ingot is then mechanically crushed and screened to obtain Nb-Ta-C pre-alloyed particles with a particle size of 2 mm to 5 mm.

[0062] Preparation of titanium-based amorphous alloys: Weigh out Ti, Zr, Cu, Be, Sr-Ce pre-alloy, and Nb-Ta-C pre-alloy raw materials according to the above alloy composition mass percentages, and mix them evenly. Place the mixture in a vacuum induction melting furnace, and melt it under a vacuum degree ≤1×10⁻⁶. -2 Under the protection of Pa, the alloy was melted at 1220℃ for 18 minutes, and then quickly turned over once after melting to obtain a titanium-based amorphous alloy melt. The melt was then formed by die casting with an injection pressure of 138MPa, a mold preheating temperature of 156℃, a die casting speed of 1.12m / s, and a cooling rate of 2×10⁻⁶. 3 K / s yields titanium-based amorphous alloy products.

[0063] Performance testing: The density of the titanium-based amorphous alloy product is 5.2 g / cm³. 3The bending strength is 1700 MPa, the Vickers hardness is 445 HV, and the oxygen content is 0.028 wt%. The critical diameter was determined by casting bars of different diameters using copper molds and combining this with X-ray diffraction to detect the amorphous phase. The critical diameter was found to be 6 mm. Example

[0064] The alloy composition of the titanium-based amorphous alloy for precision forming provided in this embodiment, by mass percentage, is: Ti 45.2%, Zr 30.6%, Cu 11.0%, Be 3.1%, Sr 2.2%, Ce 1.8%, Nb 3.0%, Ta 3.0%, C 0.05%, with the balance being unavoidable impurities.

[0065] Preparation of Sr-Ce pre-alloy: Metallic Sr and metallic Ce were weighed according to a mass ratio of Sr:Ce = 1.22:1. Ce was placed at the bottom of a zirconia crucible first, followed by Sr. The mixture was heated to 710℃ and held for 18 minutes in a mixed atmosphere of argon and helium (argon volume percentage 99.9%, oxygen content ≤20ppm) to ensure homogeneity. Using a tightly coupled gas atomizing nozzle, high-purity argon (99.999% purity) was used as the atomizing gas at a pressure of 5.5MPa and a gas-liquid mass ratio of 1.25:1. The mixture was rapidly solidified at a cooling rate of 28℃ / s to produce near-spherical Sr-Ce pre-alloy powder. The powder had a sphericity ≥0.7 and a particle size of 150~250μm. The powder was collected and sieved under an inert atmosphere, and then vacuum-sealed in an environment with an oxygen content ≤5ppm.

[0066] Preparation of Nb-Ta-C pre-alloy: Weigh Nb and Ta raw materials according to a mass ratio of Nb:Ta = 1:1, add TaC powder accounting for 0.25% of the total mass of Nb and Ta, and mix thoroughly. Under a vacuum degree ≤ 5 × 10⁻⁶ -2 Under the condition of Pa, the Nb-Ta-C pre-alloyed ingot is melted in a vacuum electric arc furnace until completely melted, and then turned over and melted 5 times to obtain an Nb-Ta-C pre-alloyed ingot. The ingot is then mechanically crushed and screened to obtain Nb-Ta-C pre-alloyed particles with a particle size of 2 mm to 5 mm.

[0067] Preparation of titanium-based amorphous alloys: Weigh out Ti, Zr, Cu, Be, Sr-Ce pre-alloy, and Nb-Ta-C pre-alloy raw materials according to the above alloy composition mass percentages, and mix them evenly. Place the mixture in a vacuum induction melting furnace, and melt it under a vacuum degree ≤1×10⁻⁶. -2 Under the protection of Pa, the mixture was melted at 1250℃ for 15 minutes, and then quickly turned over once after melting to obtain a titanium-based amorphous alloy melt. The melt was then formed by die casting with an injection pressure of 142MPa, a mold preheating temperature of 158℃, a die casting speed of 1.18m / s, and a cooling rate of 3×10⁻⁶. 3K / s yields titanium-based amorphous alloy products.

[0068] Performance testing: The density of the titanium-based amorphous alloy product is 5.2 g / cm³. 3 The bending strength is 1750 MPa, the Vickers hardness is 475 HV, and the oxygen content is 0.019 wt%. The critical diameter was determined by casting bars of different diameters using copper molds and combining this with X-ray diffraction to detect the amorphous phase. The critical diameter was found to be 6 mm. Example

[0069] The alloy composition of the titanium-based amorphous alloy for precision forming provided in this embodiment, by mass percentage, is: Ti 48.5%, Zr 28.5%, Cu 11.0%, Be 3.1%, Sr 2.2%, Ce 1.8%, Nb 2.4%, Ta 2.4%, C 0.04%, with the balance being unavoidable impurities.

[0070] Preparation of Sr-Ce pre-alloy: Metallic Sr and metallic Ce were weighed according to a mass ratio of Sr:Ce = 1.22:1. Ce was placed at the bottom of a zirconia crucible first, followed by Sr. The mixture was heated to 700℃ and held for 18 minutes in a mixed atmosphere of argon and helium (argon volume percentage 99.8%, oxygen content ≤20ppm), with electromagnetic stirring to ensure homogeneity. A tightly coupled gas atomizing nozzle was used, employing high-purity argon (99.999% purity) as the atomizing gas at a pressure of 5MPa and a gas-liquid mass ratio of 1.2:1. The mixture was rapidly solidified at a cooling rate of 28℃ / s to produce near-spherical Sr-Ce pre-alloy powder. The powder had a sphericity ≥0.7 and a particle size of 150~250μm. The powder was collected and sieved under an inert atmosphere, and then vacuum-sealed in an environment with an oxygen content ≤5ppm.

[0071] Preparation of Nb-Ta-C pre-alloy: Weigh Nb and Ta raw materials according to a mass ratio of Nb:Ta = 1:1, add TaC powder accounting for 0.2% of the total mass of Nb and Ta, and mix thoroughly. Under a vacuum degree ≤ 5 × 10⁻⁶ -2 Under the condition of Pa, the Nb-Ta-C pre-alloyed ingot is melted in a vacuum electric arc furnace until completely melted, and then turned over and melted four times to obtain an Nb-Ta-C pre-alloyed ingot. The ingot is then mechanically crushed and screened to obtain Nb-Ta-C pre-alloyed particles with a particle size of 2 mm to 5 mm.

[0072] Preparation of titanium-based amorphous alloys: Weigh out Ti, Zr, Cu, Be, Sr-Ce pre-alloy, and Nb-Ta-C pre-alloy raw materials according to the above alloy composition mass percentages, and mix them evenly. Place the mixture in a vacuum induction melting furnace, and melt it under a vacuum degree ≤1×10⁻⁶. -2Under the protection of Pa, the mixture was melted at 1200℃ for 16 minutes, and then quickly turned over once after melting to obtain a titanium-based amorphous alloy melt. The melt was then formed by die casting with an injection pressure of 135MPa, a mold preheating temperature of 155℃, a die casting speed of 1.1m / s, and a cooling rate of 10. 3 K / s yields titanium-based amorphous alloy products.

[0073] Performance testing: The density of the titanium-based amorphous alloy product is 5.2 g / cm³. 3 The bending strength is 1680 MPa, the Vickers hardness is 460 HV, and the oxygen content is 0.032 wt%. The critical diameter was determined by casting bars of different diameters using copper molds and combining this with X-ray diffraction to detect the amorphous phase. The critical diameter was found to be 6 mm. Example

[0074] The alloy composition of the titanium-based amorphous alloy for precision forming provided in this embodiment, by mass percentage, is: Ti 50.0%, Zr 28.0%, Cu 10.0%, Be 3.4%, Sr 2.3%, Ce 1.8%, Nb 2.2%, Ta 2.2%, C 0.05%, with the balance being unavoidable impurities.

[0075] Preparation of Sr-Ce pre-alloy: Metallic Sr and metallic Ce were weighed according to a mass ratio of Sr:Ce = 1.28:1. Ce was placed at the bottom of a zirconia crucible first, followed by Sr. The mixture was heated to 730℃ and held for 19 minutes in a mixed atmosphere of argon and helium (argon volume percentage 99.9%, oxygen content ≤20ppm) to ensure homogeneity. Using a tightly coupled gas atomizing nozzle, high-purity argon (99.999% purity) was used as the atomizing gas at a pressure of 6MPa and a gas-liquid mass ratio of 1.3:1. The mixture was rapidly solidified at a cooling rate of 29℃ / s to produce near-spherical Sr-Ce pre-alloy powder. The powder had a sphericity ≥0.7 and a particle size of 150~250μm. The powder was collected and sieved under an inert atmosphere, and then vacuum-sealed in an environment with an oxygen content ≤5ppm.

[0076] Preparation of Nb-Ta-C pre-alloy: Weigh Nb and Ta raw materials according to a mass ratio of Nb:Ta = 1:1, add TaC powder accounting for 0.22% of the total mass of Nb and Ta, and mix thoroughly. Under a vacuum degree ≤ 5 × 10⁻⁶ -2 Under the condition of Pa, the Nb-Ta-C pre-alloyed ingot is melted in a vacuum electric arc furnace until completely melted, and then turned over and melted four times to obtain an Nb-Ta-C pre-alloyed ingot. The ingot is then mechanically crushed and screened to obtain Nb-Ta-C pre-alloyed particles with a particle size of 2 mm to 5 mm.

[0077] Preparation of titanium-based amorphous alloys: Weigh out Ti, Zr, Cu, Be, Sr-Ce pre-alloy, and Nb-Ta-C pre-alloy raw materials according to the above alloy composition mass percentages, and mix them evenly. Place the mixture in a vacuum induction melting furnace, and melt it under a vacuum degree ≤1×10⁻⁶. -2 Under the protection of Pa, the mixture was melted at 1250℃ for 15 minutes, and then quickly turned over once after melting to obtain a titanium-based amorphous alloy melt. The melt was then formed by die casting with an injection pressure of 145MPa, a mold preheating temperature of 160℃, a die casting speed of 1.2m / s, and a cooling rate of 5×10⁻⁶. 3 K / s yields titanium-based amorphous alloy products.

[0078] Performance testing: The density of the titanium-based amorphous alloy product is 5.2 g / cm³. 3 The bending strength is 1410 MPa, the Vickers hardness is 466 HV, and the oxygen content is 0.035 wt%. The critical diameter was determined by casting bars of different diameters using copper molds and combining this with X-ray diffraction to detect the amorphous phase. The critical diameter was found to be 8 mm. Example

[0079] The alloy composition of the titanium-based amorphous alloy for precision forming provided in this embodiment, by mass percentage, is: Ti 50.0%, Zr 31.0%, Cu 7.0%, Be 2.2%, Sr 2.3%, Ce 1.8%, Nb 2.8%, Ta 2.8%, C 0.04%, with the balance being unavoidable impurities.

[0080] Preparation of Sr-Ce pre-alloy: Metallic Sr and metallic Ce were weighed according to a mass ratio of Sr:Ce = 1.28:1. Ce was placed at the bottom of a zirconia crucible first, followed by Sr. The mixture was heated to 720℃ and held for 18 minutes in a mixed atmosphere of argon and helium (argon volume percentage 99.9%, oxygen content ≤20ppm), with electromagnetic stirring to ensure homogeneity. A tightly coupled gas atomizing nozzle was used, employing high-purity argon (99.999% purity) as the atomizing gas at a pressure of 5.5MPa and a gas-liquid mass ratio of 1.25:1. The mixture was rapidly solidified at a cooling rate of 28℃ / s to produce near-spherical Sr-Ce pre-alloy powder. The powder had a sphericity ≥0.7 and a particle size of 150~250μm. The powder was collected and sieved under an inert atmosphere, and then vacuum-sealed in an environment with an oxygen content ≤5ppm.

[0081] Preparation of Nb-Ta-C pre-alloy: Weigh Nb and Ta raw materials according to a mass ratio of Nb:Ta = 1:1, add TaC powder accounting for 0.2% of the total mass of Nb and Ta, and mix thoroughly. Under a vacuum degree ≤ 5 × 10⁻⁶ -2Under the condition of Pa, the Nb-Ta-C pre-alloyed ingot is melted in a vacuum electric arc furnace until completely melted, and then turned over and melted four times to obtain an Nb-Ta-C pre-alloyed ingot. The ingot is then mechanically crushed and screened to obtain Nb-Ta-C pre-alloyed particles with a particle size of 2 mm to 5 mm.

[0082] Preparation of titanium-based amorphous alloys: Weigh out Ti, Zr, Cu, Be, Sr-Ce pre-alloy, and Nb-Ta-C pre-alloy raw materials according to the above alloy composition mass percentages, and mix them evenly. Place the mixture in a vacuum induction melting furnace, and melt it under a vacuum degree ≤1×10⁻⁶. -2 Under the protection of Pa, the mixture was melted at 1200℃ for 15 minutes, and then quickly turned over once after melting to obtain a titanium-based amorphous alloy melt. The melt was then formed by die casting with an injection pressure of 135MPa, a mold preheating temperature of 155℃, a die casting speed of 1.1m / s, and a cooling rate of 10. 3 K / s yields titanium-based amorphous alloy products.

[0083] Performance testing: The density of the titanium-based amorphous alloy product is 5.2 g / cm³. 3 The bending strength is 1660 MPa, the Vickers hardness is 455 HV, and the oxygen content is 0.036 wt%. The critical diameter was determined by casting bars of different diameters using copper molds and combining this with X-ray diffraction to detect the amorphous phase. The critical diameter was found to be 6 mm.

[0084] As can be seen from the above embodiments, by optimizing the alloy composition and combining it with Sr-Ce pre-alloying powder spraying process, Nb-Ta-C pre-alloying vacuum arc melting process and precision die casting process, the present invention has successfully prepared titanium-based amorphous alloy products with low density, high bending strength, good amorphous forming ability, high dimensional accuracy and high forming yield. It effectively solves the technical problems of high oxygen sensitivity, weak amorphous forming ability and difficulty in forming complex and precision components of existing titanium-based amorphous alloys, and meets the dual requirements of lightweight and high precision for folding device hinges.

[0085] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for preparing a titanium-based amorphous alloy for precision forming, characterized in that, The composition of the titanium-based amorphous alloy, by mass percentage, includes: Ti 35~50%, Zr 28~35%, Cu 7~15%, Be 1.8~4.6%, Sr 1.5~3%, Ce 1.5~3%, Nb 1.5~3%, Ta 1.5~3%, C≤0.1%, balance being unavoidable impurities.

2. The preparation method according to claim 1, characterized in that, The Sr and Ce are added in the form of Sr-Ce pre-alloy, and the mass ratio of Sr to Ce is 1.15:1 to 1.30:1 when the Sr-Ce pre-alloy is prepared.

3. The preparation method according to claim 2, characterized in that, The Sr-Ce pre-alloy is prepared by the following powder spraying process: under the protection of an inert atmosphere, Sr and Ce with a mass ratio of 1.15:1 to 1.30:1 are melted and then rapidly solidified by atomization powder spraying process at a cooling rate of 25℃ / s to 30℃ / s to produce spherical Sr-Ce pre-alloy powder.

4. The preparation method according to claim 3, characterized in that, The inert atmosphere is a mixture of argon and helium, wherein the volume percentage of argon is 99.8% to 99.9%, and the oxygen content in the inert atmosphere is ≤20ppm. The melting temperature is 650℃~750℃, and the melting space is kept under positive pressure.

5. The preparation method according to claim 4, characterized in that, During the preparation process, the melting includes: First, place Ce at the bottom of the zirconia crucible, then add Sr; After heating to 650℃~750℃, hold the temperature for 15min~20min, and use electromagnetic stirring to make the melt uniform.

6. The preparation method according to claim 5, characterized in that, The atomization powder spraying process uses a tightly coupled gas atomizing nozzle, the atomizing gas is high-purity argon, the atomization pressure is 3MPa~8MPa, and the gas-liquid mass ratio is 0.8:1~1.5:1; the Sr-Ce pre-alloyed powder has a sphericity ≥0.7 and a particle size of 150~250μm; the Sr-Ce pre-alloyed powder is collected and sieved under an inert atmosphere, and then vacuum-sealed in an environment with an oxygen content ≤5ppm.

7. The preparation method according to claim 1, characterized in that, The Nb and Ta are added in the form of Nb-Ta-C pre-alloy, and the mass ratio of Nb to Ta is 1:1 when preparing the Nb-Ta-C pre-alloy.

8. The preparation method according to claim 7, characterized in that, The preparation of the Nb-Ta-C pre-alloy includes: Nb and Ta raw materials in a mass ratio of 1:1 are mixed evenly with TaC powder accounting for 0.1% to 0.3% of the total mass of the Nb and Ta raw materials. Vacuum degree ≤ 5 × 10 -2 Under the condition of Pa, it is melted in a vacuum electric arc furnace until completely melted, and then turned and melted 3 to 5 times to obtain Nb-Ta-C pre-alloyed ingots; The ingot is mechanically crushed and screened sequentially to obtain Nb-Ta-C pre-alloyed particles with a particle size of 2mm~5mm.

9. The preparation method according to claim 1, characterized in that, Includes the following steps: Weigh out the Ti, Zr, Cu, Be, Sr-Ce pre-alloy and Nb-Ta-C pre-alloy raw materials according to the stated mass percentages, mix them evenly to obtain a mixture; The mixture is placed in a vacuum induction melting furnace or a vacuum arc melting furnace, with a vacuum degree ≤1×10⁻⁶. -2 Under the protection of Pa or an inert atmosphere, melt at 1100℃~1300℃ for 10min~20min, and after melting, quickly turn it over once to obtain titanium-based amorphous alloy melt; The titanium-based amorphous alloy melt was formed by die casting with a cooling rate of 10. 2 K / s ~10 4 K / s yields titanium-based amorphous alloy products.

10. The preparation method according to claim 9, characterized in that, The injection pressure of the die-casting process is 120MPa~150MPa, the mold preheating temperature is 150℃~160℃, and the die-casting speed is 0.95m / s~1.25m / s.